Apainterworkingonthetowerhungapotofpaintononeofthehands.1who2hadbeen3had4----请问选择哪一个,及分别说出每个为什么对与错,

Question

A painter___working on the tower hung a pot of paint on one of the hands.
1 who 2 had been 3 had 4 ----
请问选择哪一个,及分别说出每个为什么对与错,

Answer 1

4 不填
这里working on the tower是 非谓语动词结构 直接做定语修饰 a painter
who引导从句,那么从句中要有谓语动词,把 working 改成 was working或worked就可以了
而这句话 主语是a painter 谓语动词是hung,不能再有其他谓语动词了,填2,3就都错了